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Old 03-17-2013, 08:34 AM
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T-700r4 no reverse good line-pressure

Hello all,

I have been having a hate/love affair with my TH700 R4 non electrical.

The transmission was bad so I took it apart, the engine brake didnt work very well and most of the times he would skip 2nd. After 150k miles.

I rebuilded it: new clutches, new 2-4 band, new seals
I check for cracks and wear on the hardware and put it back together.
During the rebuild I made some pictures while taking it apart.

After a week the workshop manual book arrived from the great USA.
the first thing I notist was that there where differant amount of checkball in my tranny then there were it the book. But I took pictures and the transmission was fine al the time before getting bad. So I put it in like I have taken it out.

First test drive after installing it back in the car. no Reverse.
When I select overdrive of Drive it kicks in pretty hard, like an manual transmission with a bad clutch.

All the forward gears work fine. Just the reverse is not present.
I have been measuring line pressure with the information from the book.
All gears are in the top pressure range of the table some even a little bit higher.

When I select the Revers it wants to move a little bit backwards (2inches) but then stops puching the car backwards of forwards when in R is not possible. I feels like there are 2 gears selected like the transmission winding up or something.
Also the engine Brake is very weak .

Is there anyone how can give me some advice, my feeling says it is something with these checkballs.

Cheers Arno.

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